:root {
  --bg: #0b0a09;
  --bg2: #151210;
  --gold: #d4af37;
  --gold-dim: #9a7b2f;
  --ember: #c45c26;
  --ink: #e8e0d0;
  --muted: #a39886;
  --danger: #e74c3c;
  --ok: #6bbf6b;
  --ring: #f0d878;
  --border: #3a3228;
  --card: #1a1612;
  --font: "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); background:
    radial-gradient(ellipse at 50% -10%, #2a1a0a 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, #1a0a08 0%, transparent 40%),
    var(--bg);
  color: var(--ink); min-height: 100vh; line-height: 1.65;
}
a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--ring); text-decoration: underline; }
header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(11,10,9,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
nav {
  max-width: 1100px; margin: 0 auto; padding: .85rem 1.25rem;
  display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; align-items: center; justify-content: space-between;
}
.logo {
  font-weight: 800; letter-spacing: .04em; font-size: 1.15rem; color: var(--ring);
}
.logo span { color: var(--ember); }
.nav-links { display: flex; flex-wrap: wrap; gap: .65rem 1rem; align-items: center; font-size: .92rem; }
.lang-switch a {
  display: inline-block; padding: .2rem .55rem; border: 1px solid var(--border);
  border-radius: 999px; color: var(--muted); margin-left: .25rem;
}
.lang-switch a.active { color: var(--bg); background: var(--gold); border-color: var(--gold); }
main { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }
.hero {
  text-align: center; padding: 2.5rem 1rem 2rem;
  border: 1px solid var(--border); border-radius: 18px;
  background: linear-gradient(180deg, #22180f, var(--card));
  box-shadow: 0 0 60px rgba(212,175,55,.08);
}
.hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem); margin: 0 0 .75rem;
  color: var(--ring); text-shadow: 0 0 24px rgba(240,216,120,.25);
}
.hero .subtitle { color: var(--muted); max-width: 40rem; margin: 0 auto 1.5rem; }
.verse {
  font-style: italic; color: var(--gold-dim); max-width: 36rem; margin: 1rem auto 1.5rem;
  border-left: 3px solid var(--ember); padding: .5rem 0 .5rem 1rem; text-align: left;
}
.btn {
  display: inline-block; cursor: pointer; border: none; border-radius: 999px;
  padding: .85rem 1.6rem; font-weight: 700; font-size: 1rem;
  background: linear-gradient(135deg, var(--gold), var(--ember));
  color: #1a1008; box-shadow: 0 4px 24px rgba(196,92,38,.35);
  transition: transform .15s, filter .15s;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); text-decoration: none; color: #1a1008; }
.btn.secondary { background: transparent; color: var(--gold); border: 1px solid var(--gold-dim); box-shadow: none; }
.btn.danger { background: var(--danger); color: #fff; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 2rem 0; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem;
}
.card h3 { margin: 0 0 .5rem; color: var(--gold); }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
article.lesson {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 1.5rem 1.4rem; margin: 1.25rem 0;
}
article.lesson h2 { color: var(--ring); margin-top: 0; }
article.lesson h3 { color: var(--gold); }
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #0e0c0a; border: 1px solid var(--border); border-radius: 8px;
}
code { padding: .1rem .35rem; font-size: .9em; }
pre { padding: 1rem; overflow: auto; white-space: pre-wrap; word-break: break-all; color: #d8cbb0; }
.forge-panel {
  margin-top: 2rem; padding: 1.5rem; border-radius: 16px;
  border: 1px solid var(--gold-dim); background: #14100c;
}
.forge-panel h2 { color: var(--ring); margin-top: 0; }
.keybox {
  margin-top: 1rem; padding: 1rem; border-radius: 10px; background: #0e0c0a;
  border: 1px solid var(--border);
}
.keybox label { display: block; color: var(--gold); font-weight: 600; margin-bottom: .4rem; }
.keybox textarea {
  width: 100%; min-height: 120px; resize: vertical; background: transparent;
  color: var(--ink); border: 1px solid var(--border); border-radius: 8px; padding: .75rem; font-family: inherit;
}
.warn {
  background: rgba(231,76,60,.12); border: 1px solid var(--danger); color: #f5b7b1;
  padding: .85rem 1rem; border-radius: 10px; margin: 1rem 0;
}
.okbox {
  background: rgba(107,191,107,.1); border: 1px solid var(--ok); color: #b7e0b7;
  padding: .85rem 1rem; border-radius: 10px; margin: 1rem 0;
}
.auth-bar { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.auth-bar input {
  background: #0e0c0a; border: 1px solid var(--border); color: var(--ink);
  border-radius: 8px; padding: .45rem .7rem;
}
footer {
  max-width: 1100px; margin: 0 auto; padding: 2rem 1.25rem 3rem;
  color: var(--muted); font-size: .9rem; border-top: 1px solid var(--border);
}
.toc a { display: inline-block; margin: .2rem .4rem .2rem 0; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .95rem; }
th, td { border: 1px solid var(--border); padding: .55rem .7rem; text-align: left; }
th { color: var(--gold); background: #120f0c; }
.vault-list { display: grid; gap: .75rem; }
.vault-item { display: flex; flex-wrap: wrap; gap: .5rem 1rem; justify-content: space-between; align-items: center; }
.tag { display: inline-block; font-size: .75rem; padding: .1rem .45rem; border-radius: 999px; border: 1px solid var(--gold-dim); color: var(--gold-dim); }
@media (max-width: 640px) {
  .nav-links { width: 100%; }
  .hero { padding: 1.5rem .75rem; }
}


.vip-badge{display:inline-block;padding:.15rem .6rem;border-radius:999px;background:linear-gradient(135deg,#d4af37,#8b6914);color:#1a1008;font-weight:800;font-size:.75rem;letter-spacing:.08em}
.vip-hero{border-color:#d4af37}
.tier{border:1px solid var(--gold-dim);border-radius:14px;padding:1.25rem;background:#14100c}
.tier h3{margin-top:0;color:var(--ring)}